in public
in a place/way where other people can see; openly so others can see, not secretly
People are not allowed to smoke in public in many places.

The new smoking law does not permit smoking in public.

[TahlilGaran] English Idioms Dictionary ▲

in public
adv. phr.
1. In a place open to the people; in such a way that the public may see, hear, or know; not secretly; openly.
Two boys down the street are dancing in public for pennies.
Actors are used to appearing in public.
The mayor has told his friends that he is sick but will not admit it in public.
Antonym: IN PRIVATE.
2. See: AIR ONE'S DIRTY LINEN IN PUBLIC or WASH ONE'S DIRTY LINEN IN PUBLIC.

[TahlilGaran] English Idioms Dictionary ▲